Key parameters at a glance
- A radius of 3.44 Earth radii
- A mass of 10.40 Earth masses
- Surface gravity around 0.88 g
- An orbital period of 13.727 days
- Semi-major axis 0.1135 AU
- Equilibrium temperature 783 K (510 °C)
- Distance from Earth 328.53 light-years
- Earth Similarity Index 0.287
- Travel time at Voyager 1 speed 5,793,576 years
TOI-1723 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#203of 1978
top 10.2%
This planet
3.44R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-1723 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.44 | 11.21 |
| Mass (M⊕) | 1.00 | 10.40 | 317.83 |
| Density (g/cm³) | 5.51 | 1.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.88 | 2.53 |
| Insolation (S⊕) | 1.00 | 92.36 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 10.400 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 71431780
Gaia DR2
Gaia DR2 1096515188009314688
Gaia DR3
Gaia DR3 1096515188009314688
System
TOI-1723
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 13.73 Earth days (3.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1135 AU.
Transit Fingerprint
Depth
0.090 %
Duration
4.233 h
Impact parameter b
0.353
Rp / R★
0.028690
Transit midpoint (BJD)
2,459,593.9600
Photometric dip
Transit produces a flux drop of 901 ppm lasting ≈ 4.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028690
Impact parameter (b)
0.353
RV semi-amplitude (K)
2.700 m/s
Transit mid-time (BJD)
2,459,593.9600
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
1.13000
Eq. Temperature
783K
(510 °C)
Insolation (S⊕)
92.36
Earth = 1.00
Earth Similarity (ESI)
0.287
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Polanski et al. 2024Instrument
TESS CCD Array
Publication
2024-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1723
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,777 K — cooler than the Sun (5,778 K)
Estimated Age
4.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.090 R☉
Stellar Mass
1.040 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.380 dex
Stellar density
1.132 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
9.899 mas
Total Proper Motion
13.317 mas/yr
PM Right Ascension
5.04 mas/yr
PM Declination
12.33 mas/yr
Galactic Cartesian (pc)
x = -0.165 · y = 0.327 · z = 0.930
Equatorial (J2000)
RA 116.79720° · Dec 68.47668°
Galactic ℓ, b
147.259° · 30.188°
Ecliptic λ, β
103.854° · 46.323°
HTM-20 index
707020801
Similar Worlds
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Sub-Neptune · G-type yellow (Sun-like)
Radius 3.44 R⊕ · 1,229.2 ly
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HD 20003 b
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HIP 9618 c
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Kepler-95 b
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TOI-132 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.42 R⊕ · 533.8 ly